do_exec_pty(..)

[Sunil K. Vallamkonda]

This is running in inetd mode 'sshd -i'
and having entry in inetd.conf.


On Thu, 1 Mar 2001, Damien Miller wrote:

> On Wed, 28 Feb 2001, Sunil K. Vallamkonda wrote:
> 
> > Hello,
> >
> > I see that incase of command execution:
> > :fork()" is called twice, in sshd.
> > Once to spin off child sshd from parenat and
> > second from child sshd, to execute command.
> > Due to this I see 3 processes being created
> > for each connection viz:
> >
> > 16398  0.0  0.3  1284  892 ??  S     4:33PM    0:00.05 sshd:child
> > 16399  0.0  0.1   320  232 p4  Is+   4:33PM    0:00.06 -sh -c foo_command
> > 16401  0.0  0.3  2076  840 p4  S+    4:33PM    0:00.01 foo_command
> >
> > I may be missing something, but
> > I was wondering to why second
> > fork() is required to execute a command
> > on server.
> > To execute a command, the child sshd could execve(..).
> > thus eliminate the need for second fork() and possibly
> > simpler code path.
> 
> The first fork is because the long-term sshd process is acting much like
> inetd. If you don't want it, then you can run sshd in inetd mode.
> 
> -d
> 
> -- 
> | Damien Miller <djm at mindrot.org> \ ``E-mail attachments are the poor man's
> | http://www.mindrot.org          /   distributed filesystem'' - Dan Geer
> 
>